Boiler or heater.



A. H. MORROW.

BOILER 0R HEATER.

APPLICATION FILED MAY 10, 1911.

Patented Feb. 3, 1914.

[SHEETS-SHEET 1.

INVENTOFI WITNESSES COLUMBIA PLANOGRAPH 60.. WASHINGTON, D. c.

Patented Feb. 3, 1914.

2 SHEETS-811E111 2.

A. H. MORROW. BOILER 0E HEATER.

APPLICATION FILED MAY 10 1,085,754.

INVENTOR COLUMBIA PLANQGRAPH C0,.WASHINGTON. D. (:4

UNITED STATES PATENT OFFICE- ALEXANDER H, MORE-0W, OF PITTSBURGH, PENNSYLVANIA.

BOILER 0B) HEATER.

To all whom it may concern Be it known that I, ALEXANDER H. Monnow, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Boilers or Heaters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a view partly in side elevation and partly in vertical section, showing my invention applied to one type of boiler or heater; Fig. 2 is a section on the irregular line II II of Fig. 1 Fig, 3 is a view similar to Fig. 1, but showing the invention applied to a different form of boiler or'heater; Figs. 4, 5, 6 and 7 are sections taken, respectively, on the lines IVIV, V-V, VIVI and VIIVII of Fig. 3; and Figs. '8 and 9 are detail sectional views showing'another modification. I

My invention has relation to boilers o1 heaters, and is designed to provide means of novel character for getting the gas into the boiler or heater. The invention is applicable to boilers and heaters of various types, including those which are adapted to burn gas only, and also these which are particularly adapted to burn solid fuel, but which by my invention are adapted to also burn gas.

The nature of my invention will be best understood by reference to the accompanying drawings, in which I have shown its application to several different forms of boilers or heaters and which will now be de scribed, it being premised, however, that the types of heaters shown in the drawings are illustrative only, and that the invention is also applicable to various other types.

Figs. 1 and 2 show my invention applied to a water heater or boiler of the sectional unit type and which is provided with a grate 2 for burning solid fuel. 3 designates one of the sections or units which is provided with a plurality of water spaces 4, the circulating flues 5 for the products of combustion and the depending water legs 6. In accordance with my invention, each of the water legs 6 is divided to form agas combustion chamber or pocket 7, which is open at its sides and Specification of Letters Patent.

Application filed May 10, 1911.

Patented Feb. 3,1914.

Serial No; 626,353.

which also has openings 8, at its top at each side of the relatively narrow web portions 9, for the escape of the products of combustion to the circulating fines of the section. Units or sections of the general character shown in this drawing are well known in the art and need not be specifically described, my inven-' tion relating'solely to the provision of the combustion chamber or pockets 7, in the depending'water legs and to the manner of introducing the gas thereto. For the purpose of introducing the gas into these chambers or pockets, I provide the lower end portion of each of the legs 6 with a plurality of vertical mixing tubes 10, open at their upper and lower ends, their upper ends discharging through the floor of the chamber or pocket, and their lower ends opening through the bottom of the water legs. 11 designates gas supply pipes which extend underneath the mixing tubes 10, and are provided with a gas discharge 12, immediately below the lower end of each tube 10, suflicient space being provided adjacent to the discharges for the entrance of air into the tubes with the gas. The amount of air entering these fiues with thegas can be regulated at will by raising or lowering the pipes 11, in an suitable manner, one such means of adjustment being hereinafter described.

The operation will be readily understood. When it is desired to use the heater as a gasiir'ed heater, gas is turned on in the pipes 11, and escapin from the discharges 12, passes upwardly t'iirough the mixing tubes 10, of each of the units or sections where it is mixed with the proper amount of air and is discharged into the combustion chambers or pockets where combustion takes place. The products of combustion escape through the openings 8 at the upper ends of the chambers or pockets, at eachside of the web portions 9, and thence follow the usual back and forth circulation through the fines or openings 5. When the heater is used with solid fuel, the upper ends of the mixer tubes may be closed in any suitable manner, as by using thin metal covering strips, to prevent cold air entering through these tubes and also to prevent their becoming choked or clogged. The front sections of the heater may be provided with doors for closing the front sides of their combustion chambers or pockets. lVhcn burning gas, the grate may be covered in any suitable manner.

In Figs. 3 to 7, inclusive, I have shown my invention applied to a sectional unit heater, which is intended to be fired by gas only. In this type of heater, each sectional unit has a plurality of vertical water legs 13 atv its lower portion separated from each 0t er by the combustion chambers or pockets 14, the legs 13 being connected by the lower water space or chamber 15. Extending vertically through this lower water space or chamber are a series of vertical mixer tubes 16, similar to the tubes 10, before described, and supplied by means of the series of gas pipes 17 which are similar to the pipes 11. In Fig. 6, I have shown means for adjust ably securing these tubes, consisting of hanger rods 18, seated in legs 19 on the front and back heater sections and having adjusting nuts 20. Thesepipes may, however, be adjustably secured in any desired manner.

Figs. 8 and 9 illustrate the application of my invention to a boiler or heater of circular form. In applying my invention to a heater of this type, the lower vertical water leg is separated into two parts by an intermediate combustion chamber or pocket 21, which is supplied by a series of mixer tubes 22, similar to the device before described.

The mixer tubes may be cast integrally with the heater or heater sections, as shown in the drawings, or they may, of course, be formed separately and suitably secured in place. The form of my invention shown in Figs. 1 and 2 provides a more simple and eflicient construction, whereby a boiler or heater primarily intended for solid fuel is also capable of use with gas, the gas being introduced and burned in a manner to give an efhcient heating action. In the other forms shown, the provision of the mixer tubes, as described, provides simple means for introducing the gas at the desired points and getting a good distribution thereof within the heater. By the use of such tubes, a number of combustion chambers or pockets may be increased to any desired ex tent, thus providing a large area of direct water-heating surface and enabling the body of water to be broken up into a considerable number of smaller bodies.

It will be noted that the lower portions of the combustion chambers 7 and 14 are at an angle to the upper portion of the chambers, this being for the purpose of providing inclined baffling walls for the gas and air issuing from the mixer tube.

It will be seen that it is immaterial to my invention whether there be employed a single continuous, water-inclosed combustion chamber, as in Figs. 8 and 9, or whether the chamber be divided into a plurality of parts as in the other figures. By the term combustion chamber as used herein and in the appended claims, I mean either a continuous chamber or a chamber composed of a plurality of separate parts or units.

It will be obvious that my invention is, in general, independent of any particular construction of the heater, as a whole, and that it may be applied to a large variety of heaters or boilers.

I claim:

1. A heater or boiler having a combustion chamber inclosed within the water space of the heater or boiler and surrounded by such space at its top, bottom and sides, and a relatively small Bunsen tube extending upwardly through the bottom water space into the lower portion of said chamber and said tube being surrounded by the water space; substantially as described.

2. A heater or boiler having a combustion chamber inclosed within the water space of the heater or boiler and surrounded by such space at its top, bottom and sides, and a relatively small Bunsen tube extending upwardly through the bottom water space into the lower portion of said chamber and said tube being surrounded by said space, together with means for controlling the amount of air which enters said tube; substantially as described.

3. A heater or boiler having a combustion chamber inclosed in the water space thereof, and substantially surrounded by water at its top, bottom and sides, and a plurality of relatively small Bunsen tubes extending upwardly through the water space into the lower portion of said chamber and the said tubes being surrounded by said space and permitting a relatively free circulation of the water through said space; substantially as described.

4. A heater or boiler having a water leg formed with a combustion chamber therein, said chamber being surrounded at its top, bottom and sides by the water space of the leg, and a gas mixing tube extending upwardly through the lower portion of the water space into the lower portion of said chamber, said tube being surrounded by the water space to permit a relatively free circulation of the water through said space; substantially as described.

5. A heater or boiler having a combustion chamber located in the water space thereof, and substantially surrounded at top, bottom and both sides by such space, a plurality of Bunsen tubes extending upwardly into said chamber, and a series of horizontal back and forth circulating and heating flues with which the combustion chamber communicates at its upper end; substantially-as described.

6. A heater or boiler having a combustion chamber located in the water space thereof,

and substantially surrounded at top, bottom rounded by water spaces; substantially as 10 and both sides by such space, a plurality of described. Bunsen tubes extending upwardly through In testimony whereof, I have hereunto set the lower portion of the water space and my hand. openin into said chamber and a series of hOIlZOITtZLl back and forth circulating and ALEXANDER MORRQW' heating flues with which the combustion Witnesses:

chamber communicates at its upper end, said GEO. H. PARMELEE,

circulating and heating flues being also sur- H. M. CORWIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

